Melt foaming method and stir casting method were combined to prepare graded foam. The interface between Al foam and syntactic foam was analyzed. The compressive properties and failure processes of foams were compared. The stress-strain curve of graded foam was the same as that of Al foam at first, and then the stress gradually increased, keeping a similar trend as that of syntactic foam. Graded foam began to fail from the weaker Al foam, and then transferred to the syntactic foam. The failure processes of graded foam corresponded to those of Al foam and syntactic foam when they were compressed separately. The densification of Al foam was accompanied by the initial failure of syntactic foam within graded foam, which corresponded to the transitional zone in the stress-strain curve.